Audible signaling device.



J- R. SIMPSON.

AUDBLE SGNALING DEViCE.

APPLICATION FILED APR. 8, 1914.

1,220,280. Patented Mar. 27, 1917.

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John P. lmpson.

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AUDIBLE SIGNALING DEVICE.

APPLICATION FILED APR.8, 1914.

1 220,280. Patented Mar. 27, 1917.

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AUDIBLE SIGNALING DEVICE.

APPLICATION FILED APR. 8. WM.

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JOHN R. SIMPSON, 0F TROY, OHIO.

AUDIBLE SIGNALING DEVICE.

Specification of Letters Patent.

Patented Mar. 27, 1917.

Application filed April 8, 1914. Serial No. 830,496.

To all whom it may concern:

Be it known that 1, JOHN R. SIMPSON, a citizen of the United States,residing at Troy, in the county of Miami and State of Ohio, haveinvented certain new and useful Improvements in Audible SignalingDevices, of which the following is a specification.

This invention relates to improvements in audible signaling devicesespecially adapted for automobiles, boats, factories, and the like; theinvention relating more particularly to that type ofsignaling devicewhich employs a metal diaphragm for producing sounds.

One of the objects of the invention is to provide a sound-producingdevice which will be capable of producing sounds of great volume, and tofurther provide for quickly and readily adjusting the devices to givegreater or less intensity of sound, in a manner which will obviate thenecessity of any adjustment of the position of the source of powerrequired for the mechanical movements.

A further object of the invention is to provide automatically operatingmeans for changing the tone, whereby at least two distinct sounds ofdifferent intensity are produced by the same ap aratus.

A further object 0 my invention is to provide an electrically-operatedaudible signaling device whereby sounds of different intensity may beproduced in a ready manner so that the device will be capable ofproducing the majority of signals given thereby in sounds of lowintensity thereby effecting a considerable economy in the consumption ofthe current.

A further object of my invention is to provide for initially reducingthe load on the motor, thus can )ling the motor to start and acquiresufficient momentum before the heavier load for the sounds of thegreater intensity is placed thereon.

A further object of my invention is to provide, in anelectrically-operated audible signaling device, means whereby upon theinitial operation of the devices, a resistance will be placed in circuitwith the motor to reduce the volume of current through the motor, saidresistance acting in the nature of a starting box to enable the motor tostart upon a comparatively small amount of current and beingautomatically thereafter cut out to enable the motor to be supplied withthe maximum amount of current.

A further object of the invention is to provide means whereby thevibratory movements of the diaphragm may be varied to give greater orless intensity of sound although actuated from the same motive sourcefor the loud or soft tones.

A further and more specific object of the invention is-to provide, in anaudible signal mg device employing a vibratory diaphragm and a motor foroperating the same, connecting devices between said motor and diaphragmin the nature of the toggle joint, together with a movable abutment forthe same, so that said toggle joint will be given a greater or lessmovement in the direction of the diaphragm to causesaid diaphragm tomove to a greater or less extent for the purpose of producing sounds ofgreater or less intensity.

A further object of the invention is to simplify the construction andmakemore effective the operation of devices of the character referredto.

My invention consists in the various constructions hereinafterdescribed. and set forth in the claims.

In the accompanying drawings,-

Figure 1 is a top plan view of an apparatus embodying my improvements,some of the supports, the outer casing and the resonator or horn beingpartly broken away; the diaphragm and the main support being shown insection.

Fig. 2 is a diagrammatic view illustrating the electrical circuitsemployed in my apparatus.

Fig. 3 is a side elevation of the apparatus shown in Fig. 1.

Fig. 4 is a section on the line 44 of Fig. 1.

Fig. 5 is a top view in detail of one of the operating parts.

Fig. 6 is a side elevation view of the same.

Fig. 7 is a top plan of certain of the parts of the apparatusillustrating a modification.

Fig. 8 is a top plan of some of the parts partly shown in sectionillustrating another modification,

Fig. 9 is a top plan of some of the parts illustrating a furthermodification.

Like parts are represented by similar characters of reference in theseveral views.

In the said drawings, 1 represents a circular support open at the centerand having secured to one side thereof about the circular openingtherein a forwardly extending resonator in the nature of a horn 2; thissupport 1 having any suitable means, (not shown) for attaching it to amotor vehicle or other place where the apparatus is to be used.

The support 1 has a rearwardly extending peripheral flange 1 and withinthe flange portion thereof is secured a metal diahra m 3 b a rin 4'screws 5 )ro'ectin through the ring and diaphragm into the support 1securely fastening all the parts together; circular washers 6 beingpreferably interposed between the diaphragm and the ring and supportrespectively to more securely hold the diaphragm in position. Secured tothe lower portion of the ring 4 is a plate 7 having a rearwardlyextending integral shelf 8 which provides a support for the operatingparts. Suspended from the shelf 8 is an operating device, shown in thepresent instance as an electric motor 9, the armature shaft 10 of whichis extended up through a suitable bearing 11 to a point substantially inline with the transverse center of the diaphragm, where it has securedthereto a cam wheel 12 (shown in detail in Figs. 5 and 6) having aboutthe periphery thereof a series of cam faces 13.

Pivotally connected to a boss 1+ secured to the center of the diaphragm3 and projecting rearwardly therefrom is a togglejoint consisting of twopairs of members 15 and 16 pivoted together by the pin 17 and pivotallyconnected at their rear ends to the head 18* of a plunger 18 by the pin19; a pin 20 serving to pivotally connect the members 15 to thediaphragm boss 14. The plunger 18 is slidably arranged within the sleeve21 supported in a standard 22 extending upwardly from the shelf 8. Aflat spring 23 secured at one end to a bracket 21, which projectslaterallv from the standard 22, and having its free bifurcated endprojected between the head 18 and the pin carried by the plunger, servesto force the plunger rearwardly to elongate the togglejoint. The pin 25projects from each side of the plunger and operates in slots 26 in thefixed sleeve 21 so as to prevent the plunger and the toggle-jointmembers from turning.

Means are provided for regulating the rearward movement of the plunger18 under the tension of the spring 23, so as to regulate the throw ofthe toggle under the action of the cam wheel 12 and thus regulate thevibration of the diaphragm. In other words, means are provided forregulating the throw or elongation of the toggle under the action of thecams so as to cause said toggle to vibrate the diaphragm to a greater orless extent. In all of the figures excepting Fig. 9. this regulatingmeans operates automatically in the following manner:

Supported from a bracket 27 projecting from the standard 22, is amagnet, 28 representing the coil and 22-3 the poles, the armature lever29 of which is pivotally connected to a rearwardly extending boss 30secured to the standard 22. One end of the lever 29 carries the armature31 and to the other end of the lever 29 is connected a spring 32 alsoconnected to the bracket 24 to normally hold the lever 29 in theposition shown in Fig. 1, against the adjustable stop 24*. A screw 33extending through the lever near the pivotal point thereof has its innerend in line with the ends of the plunger 18 so as to form an abutmenttherefor; the spring 32 being of sufficient tension to overcome thetension of the spring 23 and also the resilience of the diaphragm sothat the screw 33 will form an abutment so as to ordinarily prevent anyrearward movement of the plunger and consequent elongation of thetoggle-joint. If the magnet 28 however should be energized so as toattract the armature 31 and rock the lever upon its pivotal point, itwill be seen that the screw 33 will be moved rearwardly away from theend of the plunger to a slight extent, thereby permitting the plunger tomove rearwardly and a consequent slight elongation of the togglejointtake place. The result of this is that when the parts are in theposition shown in Fig. 1, the toggle will have a greater throw in theforward direction under the action of the cam wheel than when the magnet28 is energized for the reason that the energization of the magnetpermits the toggle to straighten out or elongate to a slight extent sothat the consequent throw thereof in a forward direction will be less.

Means are provided for controlling these regulating devices so that themagnet will" be cut in or out as desired. In Fig. 2 is illustrated thecircuits for the motor and magnet in which 34:, 35 and 36 representthree contacts. If contact 34 is pressed against the contact 35, acircuit will be established through wire 37, battery 38, wire 39, motor9, wire 42 to contact 35. The energization of magnet 28 draws the screw33 rearwardly away from the end of the plunger and permits theelongation of the toggle-joint so that the diaphragm will be given throwin a forward direction and consequently a minimum vibration thereof willtake place for the low tones. If all three contacts are pressedtogether, the circuit will be from contact 34, wire 37, battery 38, wire39, motor 9, and wire 40 to contact 36, the magnet being shortcircuited, in consequence of which the screw 33 will act as an abutmentto hold the toggle-joint in its extreme bucwire 40, wire 41, magnet 28,and

a minimum kled condition, thereby causing a greater throw thereof in aforward direction under the action of the cam and a consequent greatermovement or vibration of the diaphragm, in the high tones. The screw 33may be adjusted to any position desired in the lever and held in itsadjusted position by the nut 13 so as to regulate the intensity of boththe low and high tones. It will, therefore, be seen that the low andhigh tones may becontrolled from a single push button, the operatorpressing the button but part way in for the low tone and to the fullestextent for the high tone.

In Fig. 7 there is shown a modification of the devices for regulatingthe throw of the toggle. In this case the armature 31 of the magnet 28is connected by a link 4A to a bifurcated wedge-shaped slide 45,slidably mounted in guides 46 on a supporting piece 22 which may beconnected with the standard 22. This bifurcated wedge 15 straddles thesleeve 21 and the ends of the pin 25 are extended sufficiently beyondthe plunger and sleeve so that the said wedge will lie in the path ofmovement thereof and form a stop therefor. When the magnet isdenergized, the wide part of the slide will be held in the path of thepin 25 by the spring 48, connected with the armature, and when themagnet is energized, the slide will be withdrawn so as to present thenarrow portion thereof in the path of the pin, thus permitting theelongation of the toggle in the manner before explained. The plunger andtoggle in this case are influenced by a bifurcated flat spring 49, oneend of which is attached to a bar and the other bifurcated end of whichbears against the pin 25. This bar 50 also extends through the guides 46between the slide 45 and the support 22. One end of the bar is pivotedto the support 22 as at 51 and a spring 52, placed about a pin 53projecting from the support 22 and interposed between the collar 54: andthe said bar, tends to force the bar against the support. An adjustingscrew 55 in said support and bearing against the opposite end of the barfrom the pivotal point thereof, serves to adjust said bar in a forwarddirection so as to move the wedge 45 forwardly so that means are thusprovided for regulating the intensity of both the low and high tones.

In Fig. 8 another modification is shown in which the bar 50 is dispensedwit In this case the wedge 45 may pass through apertures 56 and 57 inthe sleeve 21 and plunger 18 respectively. The aperture 57 in theplunger may the pin 25 passes through so that the pin 25 will cooperatewith the sliding wedge. coil spring 58 interposed between the end of thesleeve 21 and the collar 59 on the end of the plunger 18 serves to forcethe plunger rearwardly to elongate the toggle.

be at the point where In Fig. 9 a further modification is shown in whichthe automatic two-toned regulating devices are dispensed with. In thiscase, an adjustable stop, in the nature of a screw 60 is providedlocated in a fixed support 61 back of the standard 22 in line with therear end of the plunger 18; nuts 62 and ()3 being employed to lock thescrew in its adjusted position. This does not permit of the two tones,for the screw may be adjusted to regulate the intensity or volume of asingle tone.

By the constructions described, it will be seen that I have provided adevice in which different tones may be readily produced; that I am alsoenabled to adjust the devices in a. ready manner to produce sounds ofdifferent intensity on either the low or high tones.

It Will be seen that by the constructions described, where an electricmotor is employed, the first operation of producing an alarm removes acertain portion of the load from the motor by permitting a slightelongation of the toggle-joint, thus permitting the motor to start morereadily, particularly where the relation of the contact point of thetoggle with the cam is such that the greatest tension or weight isplaced thereon.

It will be further seen that upon the initial operation of magnet willbe placed in circuit with the electric source so as to cause the same toact in the nature of a starting box to reduce the volume of currentthrough the motor.

It will further be seen that in producing the low tone the magnet willbe in circuit and act in the nature of a resistance to cause the motorto consume less current than in the production of the high tones, andthat, inasmuch as the great majority of the signals are of the low tonevariety, a considerable saving in the consumption of current iseffected.

This also has the effect of reducing the speed of the motor on the lowtones, but so soon as the magnet is cut out in the manner described forthe high tone, the speed of the motor will be correspondingly increased.

By this arrangement, for the low tones the extent of movement of thediaphragm is not only decreased, but the frequency of the vibratorymovements is likewise decreased, while for the high tones the extent ofmovement of the diaphragm will be increased and likewise the frequencyof the vibratory movements increased.

Having thus described my invention, I claim:

1. In an audible signaling apparatus, a diaphragm, an operating deviceimmovable in the direction of said diaphragm, connecting devicesconnected with said diaphragm and operatively associated with saidoperating device, and controllable means dependent upon the operation ofsaid apparatus for producing an alarm the 9 varying the throw of saidconnecting devices.

2. In an audible signaling apparatus, a diaphragm, an operating device,a movable connection connected with said diaphragm and operativelyassociated with said operating device, an abutment for said connectionto limit the movement thereof in one direc tion, and controllable meansdependent upon the operation of said apparatus for adjusting saidabutment. 4

3. In an audible signaling apparatus, a diaphragm, an operating device,a toggle joint connected with said diaphragm and operatively associatedwith said operating device, an abutment to limit the movement of saidjoint in one direction, and means for adjusting said abutment to varythe throw of said toggle.

4. In an audible signaling apparatus, a diaphragm, a rotatable camwheel, a toggle joint having one end connected to said diaphragm andoperatively associated with said cam wheel, an abutment for the oppositeend of said toggle joint, and means for adj usting said abutment.

5. In an audible signaling apparatus, a diaphragm, a rotatable camwheel, a toggle joint having one end thereof pivotally connected withsaid diaphragm, a plunger pivotally connected to the opposite end ofsaid toggle joint, a bearing for said plunger, and an adjustableabutment for said plunger.

6. In an audible signaling apparatus, a diaphragm, operating mechanismimmovable in the direction of said diaphragm for imparting vibratorymovements to said diaphragm having a single source of power, andcontrollable means dependent upon the operation of said apparatus forvarying the movement of said operating mechanism.

7. In an audible signaling apparatus, a diaphragm, an operatingmechanism for imparting vibratory movements to said diaphragm, a movableabutment for said operating mechanism, and controllable means dependentupon the operation of said apparatus for changing the relation of saidabut ment with respect to said operating mechanism to vary the movementsof said mechanism.

8. In an audible signaling device, a diaphragm, an operating mechanismfor said diaphragm to impart vibratory movements thereto, andelectrically-operated means independent of said operating mechanism forvarying the movements of said operating mechanism.

9. In an audible signaling device, a diaphragm, an operating mechanismfor said diaphragm to impart vibratory movements thereto, devicesindependent of said operating mechanism for regulating the extent ofmovement of said operating mechanism, means for placing said operatingmechanism into operative condition, and means dependent upon theoperating mechanism for simultaneously controlling said regulatingdevices.

10. In an audible signaling device, a diaphragm, an operating mechanismfor said diaphragm to impart vibratory movements thereto, a movableabutment for said operating mechanism, an electrically-operated deviceconnected with said abutment, and means for controlling saidelectrically0perated device to change the relation of said abutment withrespect to said mechanism to vary the movement thereof.

11. In an audible signaling device, a diaphragm, an operating mechanismfor said diapl thereto, a movable abutment for said operating mechanisian electrically-operated device connected with said abutment, means forthrowing said operating mechanism. into operating condition, and meansfor simultaneously controlling said electrically-operated device tochange the relation of said abutment with respect to said mechanism tovary the movement thereof.

12. In an audible signaling device, a diaphragm, an operating device,devices connected with said diaphragm and operatively associated withsaid operating device, and electri ally-controlled means for varying thethrow of said connecting device independently of said operating device.

13. In an audible signaling apparatus, a diaphragm, an operating device,devices connecting said operating device with said diaphragm andoperatively associated with said operating device, means for controllingthe operation of said operating device, and electrically-controlledmeans for varying the throw of said connecting device independently ofsaid operating device.

14. In an audible signaling apparatus, a diaphragm, an operating device,a movable connection connected with said diaphragm and operativelyassociated with said operating device, a movable abutment for saidconnection to limit the movement thereof in one direction, andelectrically-controlled means for adjusting said abutment to cause thesame to permit a variation in the movement of said connection.

15. In an audible signaling apparatus, a diaphragm, an operating device,a movable connection connected with said diaphragm and operativelyassociated with said operating device, an abutment for said connectionto limit the movement thereof in one direction, means for controllingsaid operating device, and electrically-operated means forsimultaneously adjusting said abutment to cause the same to permit avariation in the movement of said connection.

*agm to impart vibratory movements diaphragm, an operating device, atogglejoint connected with said diaphragm and operatively associatedwith said operating device. an abutment to limit the movement of saidjoint in one direction. and electrically-controlled means for adjustingsaid abutment to vary the throw of said toggle.

17. In an audible signaling device, a diaphragm, an operating device, atoggle joint connected with said diaphagm and operatively associatedwith said operating device, an abutment to limit the movement of saidjoint in one direction, means for controlling said operating device, andelectrically-operated means for simultaneously adjusting said abutmentto vary the throw of said toggle.

18. In an audible signaling apparatus, a diaphragm, a rotatablecam-wheel, a toggle joint having one end connected to said diaphragm andoperatively associated with said cam wheel, an abutment for the oppositeend of said toggle joint, and electricallycontrolled means for adjustingsaid abutment to vary the movement of said toggle joint.

19. In an audible signaling apparatus, a diaphragm, a rotatable camwheel, a toggle joint having one end connected to said diaphragm andoperatively associated with said cam wheel. an abutment for the oppositeend of said toggle joint, means for controlling said cam wheel, andelectrically-operated means for adjusting said abutment to permit avariation in the movement of said toggle joint.

20. In an audible signaling apparatus, a diaphragm, a rotatable camwheel, a toggle joint having one end thereof pivot-ally connected tosaid diaphragm, a plunger pivotally connected to the opposite end ofsaid toggle joint, a bearing for said plunger, an adjustable abutmentfor said plunger. and electrically-operated means for controlling saidabutment to permit a variation in the movement of said toggle joint.

21. In an audible signaling apparatus, a diaphragm, a rotatable camwheel, a toggle joint having one end thereof pivotally connected to saiddiaphragm. a plunger pivotally connected to the opposite end of saidtoggle joint, a bearing for said plunger, an adjustable abutment forsaid plunger, means for controlling said cam wheel, andelectrically-operated means for simultaneously controlling said abutmentto permit a variation in the throw of said toggle joint.

22. In an audible signaling apparatus, a diaphragm, an electric motor,operating mechanism operated by said motor and connected with saiddiaphragm to impart vibratory movements thereto, electrically-operateddevices for varying the movements of said operating mechanism, and aswitch for controlling said motor and electrically-operated devices.

23. In an audible signaling apparatus, a diaphragm, an electric motor,operating mechanism operated by said motor and connected with saiddiaphragm to impart vibratory movements thereto, an adjustable abutmentfor said operating mechanism, electrically-operated devices connectedwith said abutment to adjust the relation of the same with saidmechanism, and a switch for controlling said motor andelectrically-operated devices.

24. In'an audible signaling device, a diaphragm, an electric motor, acam wheel operated by said motor, a toggle joint connected with saiddiaphragm and operatively associated with said cam wheel, an abutment tolimit the movement of said joint in one direction, an electricallyoperated device connected with said abutment to adjust the same to varythe throw of said toggle, and a switch for controlling said motor andelectrically-operated device.

25. In an audible signaling apparatus, a diaphragm, an electric motor, acam wheel connected with said motor, a toggle joint having one endconnected to said diaphragm and operatively associated with said camwheel, a plunger pivotally connected to the opposite end of said togglejoint, a bearing for said plunger, an adjustable abutment for 9 saidplunger and electrically-operated devices connected with said abutmentfor changing the relation of the same with respect to said plunger, anda switch for controlling said motor and electrically-oper- 100 ateddevices.

26. In an audible signaling apparatus, a diaphragm, an electric motor,operating mechanism connected with said diaphragm and operativelyassociated with said motor, 105 adjustable devices for regulating themovement of said operating mechanism comprising an electro-magnet, andmeans for establishing a circuit both through said magnet and motor orthrough said motor alone.

27. In an audible signaling apparatus, a diaphragm, an electric motor,operating mechanism connected with said diaphragm and operativelyassociated with said motor, adjustable devices for regulating the move-115 ment of said operating mechanism comprising an elcctro-magnet, andmeans for energizing said magnet and establishing a circuit through saidmotor and then deiiner gizing said magnet.

28. In an audible signaling apparatus, a diaphragm, operating mechanismfor imparting to said diaphragm vibratory movements, regulating devicesfor controlling the extent of movement of said operating mech- 125 anismto obtain a plurality of tones, and adjustable means associated withsaid regulating devices to also control the movement of said operatingmechanism to regulate the intensity of said tones.

29. In an audible signaling apparatus, a diaphragm, an operating device,a toggle joint connected with said diaphragm and operatively associatedwith said diaphragm, regulating devices for controlling the extent ofmovement of said toggle joint to obtain a plurality of tones, andadjustable means associated with said regulating devices to also controlthe movement of said toggle joint to regulate the intensity of saidtones.

30. In an audible signaling apparatus, a diaphragm, a rotatable camwheel, a toggle joint associated with said cam wheel and connected withsaid diaphragm to impart vibratory movements thereto, regulating devicesfor controlling the extent of movement of said toggle joint to obtain aplurality of tones, and adjustable means associated with said regulatingdevices to also control the movement of said toggle joint to regulatethe intensity of said tones.

31. In an audible signaling device, a diaphragm, an electric motor, acam wheel connected with said motor, a toggle joint connected with saiddiaphragm and operatively associated with said cam wheel, regulatingdevices comprising a magnet for controlling theextent of movement ofsaid toggle joint to obtain a plurality of tones, adjustable meansassociated with said regulating devices to also control the movement ofsaid toggle joint to regulate the intensity of said tones, and means forcontrolling said motor and magnet.

In an audible signaling apparatus, a diaphragm, an electric motor,operating mechanism between said motor and diaphragm for imparting tosaid diaphragm vibratory movements, regulating devices for controllingthe extent of movement of said operating mechanism to obtain a pluralityof tones comprising a magnet, adjustable means associated with saidregulating mechanism to regulate the intensity of said tones, and meansfor controlling said motor and magnet.

33. In an audible signaling apparatus, a diaphragm. a motor, mechanismconnected with said diaphragm and operatively associated with said motorfor imparting vibra tory movements to said diaphragm, means forcontrolling the movement of said mechanism to regulate the extent of thevibratory movements of said diaphragm, and means for controlling thespeed of said motor to correspond with the variation in the vibratorymovements of said diaphragm.

34. In an audible signaling apparatus, a diaphragm, an electric motor,mechanism connected with said diaphragm and operatively associated withsaid motor for imparting vibratory movements to said diaphragm, devicesfor controlling the movement of said mechanism to vary the extent of thevibratory movements of said diaphragm, and means for simultaneouslyvarying the speed of said motor to correspond to the variation in thevibratory movements of said diaphragm. 35. In an audible signalingapparatus, a diaphragm, an 'electric motor, mechanism connected withsaid diaphragm and operatively associated with said motor for impartingvibratory movements to said diaphragm, devices for controlling themovement of said mechanism to vary the extent of the vibratory movementsof said diaphragm, an electro-magnet for controlling said devices, andmeans for cutting said electro-magnet into or out of circuit with saidmotor for controlling the speed of said mo tor to correspond with thevariation in the vibratory movements of said diaphragm.

36. In an audible signaling apparatus, a diaphragm, an electric motor,operating mechanism connected with said diaphragm and operativelyassociated with said motor to impart vibratory movements to saiddiaphragm, devices for regulating the movement of said operatingmechanism to vary the vibratory movement of said diaphragm to cause thesame to give low and high tones, an electro-magnet for controlling saiddevices in series with said motor, and electric switching devices forplacing said magnet in circuit with the motor for the low tones and forcutting said magnet out of the circuit for high tones to thereby controlthe speed of said motor to correspond with the extent of movement ofsaid diaphragm.

In testimony whereof, I have hereunto set my hand this 1st day of April,1914.

JOHN R. SIMPSOV.

\Vitncsses CHAS. I. VVELoII, Esrrnnn E. PFEIFER.

